Claire notices that the writing on the paper is done in modern ballpoint ink, which could not exist in the 1700s. This revelation directly prompts them to finally tell Young Ian the truth about Claire being from the future.

In , "paper" plays several distinct and highly memorable roles. Because your query was brief, ✈️ The Paper Airplane (Episode 8, "Famous Last Words")

To celebrate their first wedding anniversary, Brianna makes Roger a paper airplane.

Claire’s secret medical advice ends up published in the local paper, sparking tension and suspicion among the strictly traditional 18th-century community. 📝 The Ballpoint Pen Journal (Episode 11, "Journeycake")

The most iconic use of paper in Season 5 occurs between Brianna and Roger.

Paper is also the source of major accidental drama for Claire.

Claire and Jamie examine the journal of "Otter Tooth" (a Native American man who was also a time traveler).